I've replaced the flapper on the ice dispenser and it isn't sealing properly. I bought one on Amazon and it was too warped to seal. So I got one from here and it was the same condition, but they quickly replaced it and the new one is pretty flat. ......but it's still not sealing and Frost is building up like crazy in the dispenser. I've read the air circulation is what causes the flapper to seal properly so I'm not sure if it's not sealing because of the crappy part or if I'm dealing with a totally different problem and this a symptom of something else. I can see an other problem. The fridge appears to be cooking and circulating air. Any ideas? I could really use the help. Thanks.